000 00267nam a2200109Ia 4500
100 _aChild Development; Vol 46
942 _cBK
654 _a
245 _aChild Development; Vol 46
_b1975
260 _aIllinois
_bUniversity of Chicago Press
_c1975
082 _a155.405
999 _c383310
_d383310
041 _aeng